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関連する概念動画

Atomic Nuclei: Larmor Precession Frequency01:11

Atomic Nuclei: Larmor Precession Frequency

The earth's gravitational field produces a 'twisting force' perpendicular to the angular momentum of a spinning mass (such as a spinning top) that causes the mass to 'wobble' around the gravitational field axis in a phenomenon called precession. Similarly, the magnetic moment (μ) of a spinning nucleus precesses due to an external magnetic field directed along the z-axis. The precession of the magnetic moment vector about the magnetic field is called Larmor precession, and the angular frequency...
Atomic Force Microscopy01:08

Atomic Force Microscopy

Atomic force microscopy (AFM) is a type of scanning probe microscopy that can analyze topographic details of various specimens like ceramics, glass, polymers, and biological samples. AFM offers over 1000 times more resolution than the optical imaging system. Images generated from AFM are three-dimensional surface profiles, offering an advantage over the flat, two-dimensional images from other imaging techniques.
The AFM Probe
The probe is regarded as the heart of any AFM setup and comprises the...
Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
Atomic Absorption Spectroscopy: Instrumentation01:22

Atomic Absorption Spectroscopy: Instrumentation

An atomic absorption spectrophotometer (AAS) comprises several components: a radiation source, an atomizer, a monochromator, and a detector. The radiation source can be a hollow-cathode lamp (HCL) or an electrodeless-discharge lamp (EDL), both of which provide a narrow emission line of the required wavelength. However, some instruments use continuum sources and high-resolution monochromators to achieve a narrow range of radiation.
The atomizer used in AAS can be either a flame atomizer or an...
Atomic Absorption Spectroscopy: Atomization Methods01:25

Atomic Absorption Spectroscopy: Atomization Methods

Atomic Absorption Spectroscopy (AAS) atomizes samples through flame atomization or electrothermal atomization. Flame atomization typically involves a nebulizer and spray chamber assembly to combine the sample with a fuel–oxidant mixture, creating a fine aerosol mist that enters a burner. Typically, the fuel and oxidant are combined in an approximately stoichiometric ratio. However, for atoms that are easily oxidized, a fuel-rich mixture may be more advantageous. Only about 5% of the aerosol...
Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers.  Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.

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関連する実験動画

Updated: Jul 8, 2026

High-speed Particle Image Velocimetry Near Surfaces
11:59

High-speed Particle Image Velocimetry Near Surfaces

Published on: June 24, 2013

周波数領域速度計および原子干渉実験用レーザーシステム

J Randhawa1, G Carlse1, M B Llaguno1

  • 1Department of Physics and Astronomy, York University, 4700 Keele Street, Toronto, Ontario M3J 1P3, Canada.

The Review of scientific instruments
|December 19, 2025
PubMed
まとめ

温度制御を改善し、速度測定と重力測定を可能にするコールド原子実験用の安定したレーザーシステムを開発しました。このシステムは、高度な原子物理学研究のための安定性を高めます。

キーワード:
レーザーシステムコールド原子周波数領域速度測定原子干渉測定変調フリー安定化強度安定化磁気光学トラップ

さらに関連する動画

Implementation of a Reference Interferometer for Nanodetection
16:11

Implementation of a Reference Interferometer for Nanodetection

Published on: April 26, 2014

An Experimental Protocol for Femtosecond NIR/UV - XUV Pump-Probe Experiments with Free-Electron Lasers
09:49

An Experimental Protocol for Femtosecond NIR/UV - XUV Pump-Probe Experiments with Free-Electron Lasers

Published on: October 23, 2018

関連する実験動画

Last Updated: Jul 8, 2026

High-speed Particle Image Velocimetry Near Surfaces
11:59

High-speed Particle Image Velocimetry Near Surfaces

Published on: June 24, 2013

Implementation of a Reference Interferometer for Nanodetection
16:11

Implementation of a Reference Interferometer for Nanodetection

Published on: April 26, 2014

An Experimental Protocol for Femtosecond NIR/UV - XUV Pump-Probe Experiments with Free-Electron Lasers
09:49

An Experimental Protocol for Femtosecond NIR/UV - XUV Pump-Probe Experiments with Free-Electron Lasers

Published on: October 23, 2018

科学分野:

  • 原子・分子・光学物理学;レーザ分光法;精密測定学

背景:

  • 磁気光学トラップ（MOT）は、原子のレーザー冷却に不可欠です。;従来のレーザー安定化方法は複雑であり、ノイズを導入する可能性があります。;レーザー周波数と強度の精密な制御は、高度な原子測定に不可欠です。

研究 の 目的:

  • 自作外部共振器ダイオードレーザーシステムの特性評価と仕様設定。;周波数領域コールド原子速度測定および重力加速度測定を可能にすること。;原子物理学アプリケーション向けの安定した汎用レーザーソースを実証すること。

主な方法:

  • 変調フリー技術を使用した周波数安定化。;音響光学変調器フィードバックループによる強度安定化。;制御されたレーザーずれのためのデュアル出力RFシンセサイザーとの統合。

主要な成果:

  • 変調フリー技術は、ロックイン分光法と比較して低い磁気光学トラップ温度を達成しました。;強度安定化により、低周波振動への感度が低下しました。;このシステムは、mHzからMHzのずれ範囲と10μHzの安定性を持つ2つのレーザービームを生成しました。

結論:

  • 開発されたレーザーシステムは、高精度のコールド原子測定に適しています。;変調フリー安定化と強度制御は、大きな利点をもたらします。;このシステムは、レーザー冷却された原子を用いた周波数領域干渉測定のための堅牢なプラットフォームを提供します。